Drill Pipe & BHA Components: High-Performance Drill String Solutions.
Engineered for Extreme Downhole Conditions
Drill pipes, heavy-weight drill pipes (HWDP), and drill collars form the backbone of drill strings, enabling efficient drilling in oil, gas, and geothermal wells. Designed to API SPEC 7-1/ISO 11961 standards, these components withstand torque up to 35,000 ft-lbs (API RP 7G) and dogleg severities of 15°/100 ft.
Key Product Specifications & Applications
1. Drill Pipes: Flexible Power Transmission
- OD Range: 2-3/8″ to 7-5/8″ (Range 2 & 3).
- Grades: E75 (75,000 psi yield) to S135 (135,000 psi yield).
- Connections: NC26 to 6-5/8FH with IU/EU/IEU upsets.
- Applications: High-speed rotary drilling in shale, sandstone.
Mechanical Properties:
| Grade | Yield Strength (psi) | Tensile Strength (psi) | Impact Toughness (J) |
|---|---|---|---|
| E75 | 75,000 | 95,000 | 55 |
| S135 | 135,000 | 160,000 | 85 |
2. Heavy Weight Drill Pipe (HWDP): Fatigue-Reducing Transition
- OD Range: 2-3/8″ to 6-5/8″ (Range 2 & 3).
- Wall Thickness: 0.28–0.368″ (7.11–9.35 mm).
- Function: Reduces stress between drill collars and standard pipes.
- Key Metric: 18–22% lower vibration vs. drill collars (API 7-2 tested).
Specifications:
| Size (in) | Weight (lb/ft) | Tool Joint | Grade |
|---|---|---|---|
| 2-3/8 | 6.65 | NC26 | X95 |
| 3-1/2 | 13.3 | NC38 | G105 |
3. Drill Collars: Maximum Weight-on-Bit (WOB) Control
- OD Range: 2-7/8″ to 14″.
- Material: AISI 4145H alloy steel (HRC 28–32 hardness).
- Function: Stabilizes BHA, dampens shocks in HPHT wells (>25,000 ft).
Performance Metrics:
- Stiffness: 3x higher than HWDP.
- Torque Capacity: 12,500–35,000 ft-lbs.
- Fatigue Life: 10⁷ cycles @ 500 MPa (ASTM E466).
Certifications & Competitive Advantages
- API 5DP/7-1 Monogrammed: Full traceability from forging to threading.
- Custom Threads: NC31, NC46, 5-1/2FH with PTFE dope (NACE MR0175).
- Lead Time: 25–40 days (MOQ 10 joints).
Applications by Component
- Drill Pipes:
- E75: Coalbed methane, shallow wells (<8,000 ft).
- S135: Ultra-deep directional drilling (15,000–25,000 ft).
- HWDP:
- Transition zones between collars/pipes in geothermal wells.
- Weighted drilling in unstable formations (doglegs >12°/100 ft).
- Drill Collars:
- Salt dome drilling with 30,000+ lbf WOB.
- Offshore HPHT reservoirs (400°F, 30,000 psi).
Quality Assurance
- NDT Testing: Ultrasonic (ASTM E317) + magnetic particle (ASTM E1444).
- Straightness: ≤0.005″/ft (API 7-1 Sect. 8).
- Thread Inspection: 3D laser gauging (API 5B Class 1).
Logistics & Compliance
- Packaging: VCI-coated, wooden crates with RFID tracking.
- Certifications: API Q1, ISO 9001:2015, NORSOK M-650.
- Export Docs: Mill test reports, NDE certificates, COO.
Performance Comparison
| Component | Max Torque (ft-lbs) | Dogleg Tolerance | Key Markets |
|---|---|---|---|
| Drill Pipe | 28,000 | ≤15°/100 ft | Onshore Shale |
| HWDP | 32,000 | ≤18°/100 ft | Geothermal |
| Drill Collar | 35,000 | ≤25°/100 ft | Offshore HPHT |
Product Show
Supplier of various types of carbon steel
Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.
